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PURPOSE To determine the awareness level concerning radiation dose and possible risks associated with computed tomographic (CT) scans among patients, emergency department (ED) physicians, and radiologists. MATERIALS AND METHODS Adult patients seen in the ED of a U.S. academic medical center during a 2-week period with mild to moderate abdominopelvic or(More)
PURPOSE To describe nationwide trends and factors associated with the use of computed tomography (CT) in children visiting emergency departments (EDs) in the United States between 1995 and 2008. MATERIALS AND METHODS This study was exempt from institutional review board oversight. Data from the 1995-2008 National Hospital Ambulatory Medical Care Survey(More)
OBJECTIVE The purpose of our study is to describe in detail the use of teleradiology in 2003 and to report on changes since 1999 in this rapidly evolving field. MATERIALS AND METHODS We analyze non-individually identified data from the American College of Radiology's 2003 Survey of Radiologists, a stratified random sample mail survey that achieved a(More)
PURPOSE To assess the potential for reduction of contrast material dose in hepatic spiral computed tomography (CT). MATERIALS AND METHODS Four hundred eighty-seven outpatients were randomized prospectively into nine biphasic and eight uniphasic injection protocols: 75, 100, or 125 mL of 240, 300, or 350 mg of iodine per milliliter of iohexol (18-44 grams(More)
PURPOSE To identify nationwide trends and factors associated with the use of computed tomography (CT) in the emergency department (ED). MATERIALS AND METHODS This study was exempt from institutional review board approval. Data from the 1995-2007 National Hospital Ambulatory Medical Care Survey were used to evaluate the numbers and percentages of ED visits(More)
To determine the effect of contrast medium injection rate and biphasic versus uniphasic bolus on hepatic parenchymal enhancement at computed tomography (CT), 105 patients were randomized into four protocols. Hepatic and aortic enhancement curves were measured for each protocol. The optimal scanning interval (the duration between onset of a desired hepatic(More)
The authors retrospectively evaluated 12 patients with congenital (neonatal) neuroblastoma to assess the utility of newer imaging modalities. Findings at prenatal ultrasound (US), performed in four patients, were nonspecific (hydramnios and hydrops fetalis) in two and consistent with a suprarenal mass (one solid, one cystic) in the other two. Postnatal US(More)
OBJECTIVE The purpose of our study was to assess the dose of ionizing radiation delivered through the use of unenhanced CT for suspected renal colic by determining the incidence of repeated unenhanced CT examinations and the cumulative radiation dose delivered. MATERIALS AND METHODS All unenhanced CT examinations for suspected renal colic performed at our(More)
The purpose of the study was to determine the feasibility of international teleradiology, utilizing day–night time differences, for online interpretation of overnight computed tomography (CT) studies. One hundred and two consecutive Emergency Room patients who underwent CT examinations between the hours of 11 pm and 7 am were enrolled. All age groups and(More)